1/2(√3+1)²-(3√2-2√3)(3√2+2√3)怎么算?
1个回答
1/2(√3+1)²-(3√2-2√3)(3√2+2√3)
=1/2(3+2√3+1)-(18-12)
=1/2(4+2√3)-6
=2+√3-6
=√3-4
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